JP6537217B1 - Stand-up assisting device and offset member - Google Patents

Abstract

The invention provides a standup assisting device capable of obtaining an initial standup lifting force by a gas spring even in a closed state of a seating portion, and realizing a thin thickness. A seat has a seat portion on which a top plate and a bottom plate are swingably supported, a swing mechanism housed in the seat, and locking means for closing the seat. It is a standing-up assisting device which assists the standing of a person who is seated on the seating section by tilting the upper surface plate by the mechanism, and the swinging mechanism is at least a gas spring which the piston rod supported on the pivot shaft projects to open the seating section. An offset member in which at least one of the one end and the other end of the gas spring is offset so that the axis of rotation of the rotation axis and the axis of emergence of the piston rod orthogonal to the axis of rotation do not intersect in the same plane Is supported by the pivot shaft. [Selected figure] Figure 1

Description

  The present invention relates to a standup assisting device and an offset member, and is a standup assisting device for assisting a user standing up on a top plate by inclining the top plate, and laying it on a seat of a chair or a wheelchair as needed. The present invention relates to a stand-up device that can be used and an offset member suitable for the stand-up device.

  An aged old man or a physically handicapped person with some disability in the legs has not only a great deal of effort but also a risk of falling when he gets up or sits down from a chair or wheelchair.

  When an elderly person or a person with a physical disability (hereinafter referred to as the “user” of the present invention) stands up from a chair or wheelchair and transfers it to a bed, for example, it is necessary to reduce the burden on the legs and move it safely. In addition, if the user can not transfer on their own, a carer who cares for the transfer is required.

  However, the declining birthrate and aging population are progressing in Japan, and there is a tendency for elderly people to take care of their homes. In addition, in a nursing home, etc., one caregiver often corresponds to many users, and the physical burden on the caregiver is increased, and the situation is that it can not be coped with.

  As a countermeasure for this problem, development of a care robot etc. is being promoted, but it takes a certain period of time to put it to practical use, and even if it is put to practical use, there are many problems in widespread use due to high price etc. Have problems with

  From such a background, the price is not so expensive, and an apparatus capable of assisting the user to stand up only by placing it on a seat of a chair or a wheelchair has been developed (for example, Patent Document 1).

  In the standup auxiliary chair of Patent Document 1, a seat plate is formed by a gas spring and a damper member of a low resilience polyurethane foam having a thickness that can be pinched between a seat plate and a seat plate support when the user sits down. It is configured to be pushed up and inclined. Then, in a region where the seat plate push-up moment by the gas spring is small, the push-up moment is obtained by the crushing reaction force of the low resilience polyurethane foam.

  Such a standup assisting device is generally made of a hard material such as stainless steel because of its rigidity. As a result, since it is not comfortable to sit, it is usual to lay a cushion or the like on the standing-up assisting device for use.

  However, the standing-up chair of Patent Document 1 uses a damper member made of thick low-resilience polyurethane foam in order to obtain a sufficient crushing reaction force. Therefore, not only the thickness of the stand-up assisting device itself is thick but also the seat height is further increased, and a seat cushion is further laid thereon, so the height from the floor becomes too high to secure a comfortable sitting feeling There is a problem of In particular, a short user is in danger of falling if he stands up using a standing aid with his feet floating from the floor.

  Also, there is a method in which a caregiver inserts a standing assistance device between the user's buttocks and a chair (including a wheelchair) to assist standing only when standing up, but if the thickness of the standing assistance device is thick, it is inserted It becomes difficult.

  Therefore, the problem of the thickness of the standup assist device is an important issue for the user and the caregiver. In this case, the height of the chair or the wheelchair can be designed in anticipation of the thickness of the standup assisting device if the standup assisting device is integrally assembled to the chair or the wheelchair. However, it is a stand-alone type that can be used by placing it on a chair or wheelchair seat as needed, or by the caregiver inserting a stand-up assistance device between the user's buttocks and the chair (including the wheelchair). In the case of a stand-up aid, the thickness of the stand-up aid is particularly important.

  The applicant has proposed a chair seating surface having a standup assisting function shown in Patent Document 2 as a stand-up assisting apparatus as a stand-alone type. The standup assisting device of Patent Document 2 is configured to push up and incline the seat surface by a gas spring and a torsion spring having a torsion spring position adjustment plate that pushes up the seat surface in cooperation with the gas spring and adjusts the push-up moment. It has become.

Utility model registration 3100983 gazette Patent No. 5807311

  By the way, considering that a carer inserts a standup assisting device between the user's hips and the chair (including a wheelchair) and assists the standup only when the user is short or stands up, the stand-up type standup The upper limit of the thickness of the auxiliary device is preferably 20 mm.

  However, the standup assisting device of Patent Document 2 can not have a thickness of 20 mm or less. The reason is that, as mentioned above, in order to smoothly perform the operation of standing up from the state where the user is seated on the standing-up assisting device placed on a chair (including a wheelchair), the seating surface at the initial stage of rising of the user is closed. In the region where the seat surface inclination is small from the state, a sufficient swinging force (hereinafter referred to as “initial rising force”) is required to smoothly incline the seat surface against the load of the user.

  In the case of Patent Document 2, although the seating surface is lifted by the cooperation of the torsion spring and the gas spring, the seating surface opens even slightly against the bottom plate in order for the piston rod of the gas spring to perform a projecting operation. There is a need. That is, when the seat is completely closed, the gas spring is in the state of a supporting rod and the piston rod does not protrude, so that the gas spring can not obtain an initial lifting force.

  Therefore, in the case of Patent Document 2, it is necessary to obtain an initial lifting force with a torsion spring, and it is necessary to use a large diameter torsion spring. As a result, since the winding diameter of the torsion spring becomes large, the thickness of the standup auxiliary device must be larger than 20 mm.

  The present invention has been made in view of such circumstances, and it is possible to obtain an initial rising and lifting force by the cylinder device even in the state where the seating portion is closed, so that an unprecedented thin thickness is realized. It is an object of the present invention to provide an independent stand-up assisting apparatus capable of providing an offset member suitable for the stand-up assisting apparatus.

  In order to achieve the above object, the standup assisting device of the present invention comprises a seating portion in which front end portions of an upper surface plate and a bottom plate overlapped in the vertical direction are pivotally connected and supported; And the lock means for locking the seat portion in the closed state by locking the swing operation by the swing mechanism. A moving up mechanism is operated to lift the rear end of the upper surface plate to incline the upper surface plate, thereby assisting the rising of a person seated on the seating portion. The swing mechanism is one end of the upper surface plate. Is rotatably supported, the other end is rotatably supported by the bottom plate, and the piston rod projects to at least include a cylinder device that swings in a direction to open the seating portion, and one end of the cylinder device and the other At least one of the ends is the pivot axis of the pivot and the pivot axis And infested axis orthogonal piston rod through an offset member which offsets so as not to cross on the same plane, characterized in that it is supported on the pivot shaft.

  According to the present invention, at least one of the one end and the other end of the cylinder device does not intersect in the same plane with the pivot axis of the pivot shaft and the projection axis of the piston rod orthogonal to the pivot axis. It was made to be supported by the rotation shaft via the offset member which offsets.

  As a result, even when the seat is completely closed, the cylinder device is subjected to an initial lifting force for opening the seat. That is, by pivotally supporting the cylinder device on the rotation shaft via the offset member, the cylinder device swings in the direction to open the seating portion in addition to the horizontal component force acting as a tension rod on the rotation shaft It is possible to generate a vertical component which is a power.

  Therefore, the cylinder device can be prevented from being in the state of a brace even when the seat is completely closed. As a result, since a cylinder device having a large swinging force can be used to obtain the initial rising force, the thickness of the rising aid device can be made as thin as possible. As a result, it is possible to realize a stand-up assisting device having a thin thickness which has not been achieved conventionally.

  In an aspect of the present invention, an offset member is provided at both one end and the other end of the cylinder device, and the first offset member on the top plate side offsets the projecting and retracting axis with respect to the rotation axis and the bottom plate It is preferable that the second offset member on the side offsets the rising and retracting axis toward the bottom plate with respect to the pivoting axis. As a result, both ends of the cylinder device can be offset with good balance to the rotation axis.

  In the aspect of the present invention, the offset amount of the sum of one end and the other end of the cylinder device when the separation distance between the pivot axis of the pivot shaft that does not intersect on the same plane and the emergence axis of the piston rod is an offset amount. Is preferably 4 mm or more and 8 mm or less.

  If the total offset amount is less than 4 mm, a sufficient initial lifting force can not be obtained. In addition, when the total offset amount exceeds 8 mm, an excessive force is applied to the cylinder device, and in particular, the piston rod is easily broken.

  The offset member may be provided on at least one of the one end and the other end of the cylinder device. For example, the offset amount on one end side of the cylinder device may be 8 mm and the offset amount on the other end side may be 0 mm. The offset amount of may be 8 mm and the offset amount of one end may be 0 mm.

In the aspect of the present invention, it is preferable that a rectangular thin plate-like space is provided between the top plate and the bottom plate overlapping in the vertical direction, and the swing mechanism be housed in the space when the seating portion is closed. .
The standup assisting device of the present invention may have a configuration in which the swinging mechanism is provided outside the seating portion. For example, a pivot shaft on one end side is projected to the side portion of the top plate, a pivot shaft on the other end side is projected to the side portion of the bottom plate, and one end side of the cylinder device It is also possible to swingably connect with the other end side.
However, by storing the swing mechanism in the space of the seating portion in a state where the seating portion is closed, it is possible to make the external appearance of the standup assisting device clearer. In this case, by providing the offset member, the cylinder device can be prevented from being in the state of a supporting rod even when the seating portion is completely closed, so that the rectangular thin plate can only accommodate the cylinder device when the seating portion is completely closed. It is good if there is a space of Therefore, the standup assisting device can be made thinner than ever before.
In addition, as a merit of providing a rocking | fluctuation mechanism in the outer side of a seating part, a cylinder diameter can be enlarged rather than the case where a cylinder apparatus is accommodated in space. As a result, it is possible to use a cylinder device having a large swinging force for swinging the seating portion as compared to the case where the cylinder device is housed in the space.
In an aspect of the present invention, the swing mechanism includes a first arm rotatably supported at one end by a pivot shaft provided on the inner side surface of the top plate and a pivot shaft provided on the inner side surface of the bottom plate. The other end of the second arm, one end of which is pivotally supported, is pivotally connected by a pivot pin so that it can be folded in conjunction with the swing of the seating portion, and the seating portion is closed. It consists of a link mechanism where the first arm and the second arm are folded in a straight line in the state, and link biasing means for biasing the link mechanism in the direction to expand it from the folded state, and cooperates with the cylinder device It is preferable that the apparatus further comprises rocking assistance means for opening the seating portion, and the rocking assistance means and the cylinder device are arranged in parallel in the space of the seating portion along the rocking direction of the seating portion.

  As described above, by further providing swing assist means for opening the seating portion in cooperation with the cylinder device, it is possible to assist the initial lifting force by the cylinder device. In this case, since the cylinder device can exert mainly the initial initial lifting force, it is not necessary to use, for example, a torsion spring or the like having a large wire diameter and a large winding diameter as the link biasing means of the swing assist means.

  Furthermore, since the swing assist means and the cylinder device are disposed in parallel in the space of the seat along the swing direction of the seat, the rise assist device can be thin even if the swing assist means is further provided. The thickness can be maintained as it is. Therefore, since a large initial standing and lifting force can be obtained while maintaining a small thickness, standing can be assisted smoothly when a heavy user uses the standing aid device.

In the aspect of the present invention, it is preferable that the swing assist means be disposed on the rear end side and the front end side of the seating portion. This makes it possible to assist the initial rising force by the cylinder device with a larger force than in the case of the single rocking auxiliary means. Therefore, since it is possible to obtain a larger initial standing and lifting force while maintaining a thin thickness, it is possible to smoothly support standing even when a heavier user uses the standing aid device.
In the aspect of the present invention, the lock means is provided on the lock bar provided on the inner side surface of the rear end of the top plate and the inner side surface of the rear end on the bottom plate, and when the seat is closed An engagement member in which an engagement groove to be engaged is formed, a slide mechanism which slidably supports the engagement member in the front-rear direction of the seating portion, and a lock which biases the engagement member toward the rear end of the seating portion A biasing member, and an unlocking member for releasing the engagement between the lock bar and the engaging groove of the engaging member by sliding the engaging member toward the front end of the seating portion; Preferably, the lock member is in contact with the lock bar when the top plate is swung in the closing direction of the seat portion, and has an inclined portion which slides the engaging member against the lock biasing means toward the front end.
This exemplifies one of the preferred embodiments of the locking means.

In an aspect of the present invention, the cylinder device is preferably a gas spring.
Although a gas spring can be used suitably as a cylinder apparatus which uses an offset member, it can be widely used also for the cylinder apparatus which a piston rod pops up and retracts by pneumatic pressure, oil pressure, electricity (motor) etc. besides a gas spring.
In the aspect of the present invention, the link biasing means of the swing assist means is preferably any of a torsion spring, a mainspring spring, a plate spring, and a coil spring. The torsion spring and the spring spring may be attached to either the pivot pin of the link mechanism or the pivot shaft of the seat, but a greater pivoting force can be obtained by attaching it to the pivot pin of the link mechanism.

  In the aspect of the present invention, the upper limit of the thickness of the standup assisting device is preferably 20 mm.

  This is a stand-alone type, considering that a short distance user or a caregiver inserts a standing assist device between the buttocks of the user and the chair (including the wheelchair) only when standing up. It is because it is preferable that the upper limit of the thickness of a standup assistance device is 20 mm.

  In order to achieve the above object, the offset member of the present invention has both end portions pivotable to a pair of pivoting shafts provided on respective inner side surfaces of the top plate and bottom plate pivotally coupled and supported. The offset member is used in a cylinder device supported by the piston and swings the top plate by projecting and retracting the piston rod, and connecting an end in the projecting and retracting direction of the cylinder device with the pivot shaft, the offset member being It has a through hole through which the pivot shaft passes and a connecting hole which is perpendicular to the through hole and connects the end of the cylinder device, the pivot shaft passes through the through hole, and the end of the cylinder device is connected to the linking hole. It is characterized in that when connected, the rotation axis of the rotation shaft and the projection axis of the piston rod orthogonal to the rotation axis do not intersect on the same plane.

  According to the offset member of the present invention, both end portions are rotatably supported by a pair of pivoting shafts provided on the inner side surfaces of the top plate and the bottom plate pivotally coupled and supported, and the piston By using for a cylinder device that swings the top plate by raising and lowering the rod, even when the top plate and the bottom plate are closed, the cylinder device initially lifts the lifting force to swing the top plate in the opening direction. Works.

  In the offset member of the present invention, the cylinder device is preferably a gas spring.

  The stand-up assisting device of the present invention can obtain an initial stand-up lifting force by the cylinder device even in the state where the seating portion is closed, and therefore can realize a thin thickness which has not been achieved conventionally.

  Further, the offset member of the present invention can exert an initial raising force for swinging the upper plate in the direction to open the upper plate even when the upper plate and the lower plate are closed.

The perspective view when the standing-up assistance device of this invention is opened Top view and side view when the standing up assistance device of the present invention is closed Side view of the present invention when the stand-up assisting device is opened The perspective view explaining the offset member of the present invention Explanatory drawing explaining the effect | action of an offset member The side view in the case of using a leaf spring as the link biasing means of the swing assist means in the standup assist device of the present invention The side view in the case of providing the rocking assistance means on both the rear end side and the front end side in the standup assisting device of the present invention Explanatory drawing which puts up the standing-up assistance device of this invention on the seat surface of a chair, and assists a user's standing up.

  Hereinafter, preferred embodiments of a standup assisting device and an offset member according to the present invention will be described in detail with reference to the attached drawings.

In the embodiment of the present invention, although the offset member of the present invention is applied to the standup assisting device of the present invention, the present invention is not limited to this.
In addition, although the standup assisting device of the present invention can be provided with a swing mechanism for swinging the seat portion on the outside of the seat portion, in the present embodiment, the swing mechanism is housed in the space of the seat portion. An example will be described. Further, in the present embodiment, an example of a gas spring will be described as a cylinder device which is a component of the swing mechanism.

  [Standing aid device]

  FIG. 1 is a perspective view when the standup assisting device of the present invention is opened. Moreover, (A) of FIG. 2 is a top view when the standing-up assistance device of this invention is closed, (B) is a side view. Moreover, FIG. 3 is a side view when the standing up assistance apparatus of this invention is opened.

  However, in FIG. 1, in order to make it easy to understand the internal structure of the standup assisting device, it is shown in a view which is larger than the maximum inclination angle (about 30 °) of the seating portion 12 of the standup assisting device 10 shown in FIG. Further, in FIG. 2A, the upper surface plate 20 is removed for easy understanding of the internal structure of the standup assisting device 10, and FIG. 2B shows one side of the upper surface plate 20 and the bottom surface plate 22. It is illustrated excluding the side portions 20B and 22B.

  As shown in FIGS. 1 to 3, the standup assisting device 10 according to the embodiment of the present invention mainly locks the seat portion 12, a swing mechanism 14 that swings the seat portion 12 open and close, and locks the swing mechanism 14. And lock means 16.

  (Seating part)

  The seating portion 12 is composed of a top plate 20 and a bottom plate 22 which are overlapped with a rectangular thin plate space 18 (see FIG. 2B) in the vertical direction, and the front end of the top plate 20 and the bottom plate 22 The portion is swingably connected and supported by a swing shaft 24.

  Here, with the front end, when the user (for example, an elderly person or physically disabled person) of the standing-up assisting apparatus 10 is seated on the seating portion 12 of the standing-up assisting apparatus 10 And say the end of the front. The front end portion is not limited to the seating portion 12, and is used for the members constituting the erection assisting device 10. Also, the direction orthogonal to the front-rear direction is referred to as the width direction.

  The upper surface plate 20 is orthogonal to the flat seat surface flat portion 20A on which the user M (see FIG. 8) according to the embodiment of the present invention sits and the seat surface flat portion 20A in the width direction. It comprises the bent side portions 20B and 20B. The bottom plate 22 is formed of a flat bottom flat portion 22A and side portions 22B and 22B bent at a right angle upward on both sides in the width direction of the bottom flat portion 22A. Furthermore, the pivot shaft 24 penetrates and supports the front end portions of the side portions 20B on both sides of the top plate 20 and the front ends of the side portions 22B on both sides of the bottom plate 22. Are pivotally connected. Thereby, the seating portion 12 is formed.

  Then, when the seating portion 12 is closed, the side portions 20B and 20B on both sides of the top plate 20 are covered on the outside of the side portions 22B and 22B on both sides of the bottom plate 22 so that the top plate 20 and the bottom plate 22 A rectangular thin plate-like space 18 is formed therebetween.

  Further, when the seat portion 12 is closed on the bottom plate 22 and the side portion 20B of the top plate 20 covers the side portion 22B of the bottom plate 22, the pivot shaft 30 and the lock of the swing mechanism 14 are locked. Concave notches 22C and 22D are formed so that the lock bar 62 of the means 16 does not hit the side 22B of the bottom plate 22 respectively.

  Further, as shown in FIGS. 1 and 2A, the seating portion 12 is shorter in the width direction than the length in the front-rear direction, and is formed so as to be convenient for carrying or carrying. The length in the width direction of the seating portion 12 may be a width at which the user M can sit, and is preferably, for example, about half the seating width of the chair.

  (Swinging mechanism)

  The swing mechanism 14 swings the upper surface plate 20 with respect to the bottom plate 22 to swing the opening and closing of the seating portion 12 and mainly includes a gas spring 26 (an example of a cylinder device) and a swing assist means 28. Configured In addition, although the standup assistance device 10 of this invention is realized if there is at least the gas spring 26 as the swing mechanism 14, in the embodiment of the present invention, it is an example combining the gas spring 26 and the swing assist means 28. It will be described below.

  In the swing mechanism 14, as shown in FIG. 2A, the gas spring 26 and the swing assist means 28 are arranged in parallel in the space 18 of the seat 12 along the swing direction of the seat 12. There is. As described above, by making the gas spring 26 and the swing assist means 28 not overlap, the thickness of the stand-up assist device 10 is reduced.

  The parallel arrangement of the gas spring 26 and the swing assist means 28 may place the gas spring 26 on either side of the seat portion 12 in the width direction. In FIG. 2A, FIG. 3, FIG. 3, FIG. 6, FIG. 7 are the cases where it arrange | positions on the left side.

One end of the gas spring 26 is rotatably supported at one end in the longitudinal direction (longitudinal direction) on a pivot shaft 30 provided on the inner side surface (surface on the space 18 side) of the upper surface plate 20 and the space of the bottom plate 22 The other end is rotatably supported by a rotating shaft 32 provided on the side 18.
In the present embodiment, the pivot shaft 30 on one end side of the gas spring 26 and the pivot shaft 30 of the link mechanism 48 described later are used in common, but may be provided separately. Further, the gas spring 26 is a spring in which the piston rod 26A protrudes from and retracts from the body portion 26C by utilizing the reaction force of the compressed gas filled in the sealed body portion 26C.

  Thus, the seat portion 12 is opened by the piston rod 26A protruding from the body portion 26C. The pivot shaft 30 is provided at the rear end position of the upper surface plate 20, and is supported by the side portions 20B and 20B on both sides of the upper surface plate 20. On the other hand, the pivot shaft 32 is provided at the front end position of the bottom plate 22, one end of the pivot shaft 32 is supported by the side portion 20B and the other end is between the gas spring 26 and the swing assist means 28. It is supported by a support member 34 provided upright on the bottom flat portion 22A of the bottom plate 22 of the above.

  As shown in FIG. 1, both ends of the gas spring 26 in the longitudinal direction are the pivot axis S1 of the pivots 30, 32 and the projection axis S2 of the piston rod 26A orthogonal to the pivot axis S1. Are supported by the pivot shafts 30, 32 via offset members 36 (36A, 36B) offset so as not to intersect in the same plane.

  Although the offset members 36 are provided at both ends in the longitudinal direction of the gas spring 26 in the present embodiment, the present invention also includes the case where the offset members 36 are provided on either one.

  Further, the gas spring 26 is formed such that the diameter of the body portion 26C is smaller than the height of the space 18 of the seating portion 12 (the distance between the top plate 20 and the bottom plate 22 when the seating portion 12 is closed). . Thereby, the gas spring 26 can be accommodated in the space 18 of the seating portion 12 in the closed state.

  (Offset member)

  FIG. 4 shows the offset member 36 according to the embodiment of the present invention, which is used in the standup assisting device 10 according to the embodiment of the present invention.

  Both ends of the offset member 36 are pivoted to a pair of pivot shafts 30 and 32 provided on the inner side (the side of the space 18) of the top plate 20 and the bottom plate 22 which are swingably connected and supported. It is used in a cylinder device which is freely supported and which swings the upper surface plate 20 by the piston rod 26A coming and going out, and connects the end of the cylinder device in the coming and going direction and the pivot shaft 30 or 32 A through hole 42 through which the pivot shaft 30 or 32 passes, and a connection hole 38 orthogonal to the through hole 42 and connecting the end of the cylinder device, and through the pivot shaft 30 or 32 through the through hole 42 When the end of the cylinder device is connected to the connection hole 38, the pivot axis S1 of the pivot shaft 30 or 32 and the projection axis S2 of the piston rod 26A orthogonal to the pivot axis S1 are on the same plane Do not cross at It is.

  As the cylinder device, the gas spring 26 used for the standup assisting device 10 according to the embodiment of the present invention can be suitably used, but in addition to the gas spring 26, the piston rod is exposed and retracted by pneumatic pressure, hydraulic pressure, electric motor (motor) or the like. Can also be widely used in

  In FIG. 4, two types of offset members 36 are illustrated as the offset members 36 of the present invention.

  FIG. 4A shows an L-shaped offset member 36, in which the tip of the piston rod 26A or connecting rod 26B of the gas spring 26 is connected in the direction of the axis S2 of the piston rod 26A of the gas spring 26. The rotation shaft 30, so as to have a rotation axis S1, which is a direction orthogonal to the emergence shaft core S2 and in which the connection hole 38 is bored and the emergence axial core S2 does not intersect on the same plane. An L-shaped configuration is formed by the rotational support portion 44 in which 32 through holes 42 are formed. Note that the plane including the emerging axis S2 and the plane including the pivot axis S1 are formed in parallel.

  FIG. 4B shows a U-shaped offset member 36 in which the tip of the piston rod 26A of the gas spring 26 or the connecting rod 26B is connected in the direction of the axis S2 of the piston rod 26A of the gas spring 26. A pivot axis is formed so as to have a pivot axis S1 in which the plate-like connecting portion 40 in which the connecting hole 38 is formed and the emerging axis S2 are orthogonal to the emerging axis S2 and do not intersect on the same plane. The through holes 42 of 30 and 32 are formed in a U-shape by two plate-like rotational support portions 44 and 44 formed respectively.

  In the case of any of the offset members 36 in (A) and (B) of FIG. 4, the plane including the emerging axis S2 and the plane including the pivot axis S1 are formed in parallel.

  Although the L-shaped offset member 36 is described in the present embodiment, the shape of the offset member 36 is limited to the shape shown in FIG. 4 as long as it has the function (described below) as the offset member 36. I will not.

  FIG. 5A is a view in which both ends of the gas spring 26 are rotatably supported on the pivot shafts 30 and 32 via the first offset member 36A and the second offset member 36B. 5B is a view of a conventional connection structure in which both ends of the gas spring 26 are connected to the pivot shafts 30, 32 in order to explain the operation of the offset member 36. As shown in FIG.

  5 shows a state in which the seating portion 12 is closed, and a swinging shaft 24 (not shown in FIG. 5) for swingably connecting and supporting the top plate 20 and the bottom plate 22 is provided on the left side of FIG. Be

  As shown in FIG. 5A, the gas spring 26 has a male screw 46 cut at the end of the piston rod 26A provided at one end, and is formed at the other end and the end of the connecting rod 26B. The male screw 46 is engraved in. On the other hand, a female screw (not shown) to be screwed to the male screw 46 of the gas spring 26 is engraved in the connection hole 38 of the first and second offset members 36A, 36B. Thus, the first and second offset members 36A and 36B can be attached to both ends of the gas spring 26, and the gas spring 26 can be rotatably supported on the pivot shafts 30 and 32 via the offset members 36A and 36B. .

  As shown in FIG. 5A, in the case where the offset members 36 are provided at both ends of the gas spring 26, the first offset member 36A supported on the upper surface plate 20 side is a withdrawal axis with respect to the rotation axis S1. Offset S2 to the top plate 20 side. On the other hand, the second offset member 36B on the bottom plate 22 side offsets the rising and retracting axis S2 to the bottom plate 22 with respect to the rotation axis S1.

  Here, the offset means providing a shift so that the rotation axis S1 and the emergence axis S2 do not intersect in the same plane, and the separation distance caused by the shift is referred to as an offset amount L (L1, L2) .

  The offset amount L of the offset member 36 in the rising auxiliary device 10 of the present invention is such that the sum L1 + L2 of the offset amounts L of one end and the other end of the gas spring 26, that is, the first and second offset members 36A and 36B is 4 mm to 8 mm. It is preferable that it is the following.

  The offset amount L can also be expressed by an inclination θ with respect to the emergence axis S2 of the gas spring 26. For example, when the gas spring 26 having a length of 145 mm is used, 4 mm of the sum L1 + L2 of offset amounts L is 2 ° when it is represented by the inclination angle θ (tan θ), and 8 mm is 3.16 °. That is, when the offset amount L is expressed by the inclination θ with respect to the emergence axis S2 of the gas spring 26, it is preferable that the offset amount L is 2 ° or more and 3.16 ° or less.

  <Operation of offset member>

  As shown in FIG. 5A, the seating portion 12 is locked by the locking means 16 by rotatably supporting both ends of the gas spring 26 on the pivot shafts 30, 32 via the offset members 36A, 36B. Even in the closed state, the protruding force of the piston rod 26A of the gas spring 26 potentially causes the swinging force in the direction of opening the seat 12 around the pivots 30, 32.

  That is, by supporting the gas spring 26 on the rotary shafts 30, 32 through the offset member 36, the gas spring 26 acts as a tension rod around the rotary shafts 30, 32, in addition to the horizontal component force F1 A vertical component force F2 perpendicular to the component force F1 is generated. A combined force F3 which is a swinging force for opening the seat portion 12 is generated around the rotation shafts 30, 32 by the horizontal component force F1 and the vertical component force F2. As a result, in the first offset member 36A rotatably supported by the pivot shaft 30 on the upper surface plate 20 side, an obliquely upward resultant force F3 for lifting the upper surface plate 20 is generated.

  On the other hand, in the second offset member 36B rotatably supported by the pivot shaft 32 on the bottom plate 22 side, a resultant force F3 is generated around the pivot shaft 32 to push the bottom plate 22 obliquely downward. As a result, a swinging force is applied to the seat portion 12 so as to swing the swinging shaft 24 that swingably supports the top plate 20 and the bottom plate 22 about the swing. That is, even when the seating portion 12 is closed, the gas spring 26 is in a state in which the initial rising force is latent. Therefore, by releasing the lock of the lock means 16, the seat 12 swings in the opening direction.

  As described above, according to the standup assisting device 10 of the present invention, the gas spring 26 can be prevented from being in the state of a strut even when the seat 12 is closed. Therefore, the gas spring 26 having a large swinging force can be used to obtain the initial lifting force.

  As a result, it is only necessary to have a rectangular thin plate-like space 18 that can accommodate the gas spring 26 when the seating portion 12 is closed, and the thickness of the erection assisting device 10 can be made as thin as possible. Therefore, it is possible to realize a standup assisting device 10 having a thin thickness which has not been obtained conventionally, and specifically, the upper limit 20 mm of the thickness of the standup assisting device 10 can be achieved.

  The offset amount is preferably such that the sum L1 + L2 of the offset amounts L of the first and second offset members 36A and 36B is 4 mm or more and 8 mm or less as described above. This is because if the total offset amount is less than 4 mm, a sufficient initial lifting force can not be obtained. In addition, when the total offset amount exceeds 8 mm, an excessive force is applied to the gas spring 26, and particularly the piston rod 26A and the connecting rod 26B of the gas spring 26 are easily damaged.

  The offset member 36 may be provided on at least one of the one end and the other end of the gas spring 26. For example, the offset amount of one end of the gas spring 26 may be 8 mm and the offset amount of the other end may be 0 mm. The offset amount at the other end may be 8 mm and the offset amount at the one end may be 0 mm.

  On the other hand, the connection structure of the conventional gas spring 26 and the rotating shafts 30 and 32 in FIG. 5B is based on the connecting shaft 48 of the rotating shaft core S1 of the rotating shafts 30 and 32 and the emerging shaft core of the gas spring 26. It intersects with S2 on the same plane. Therefore, when the seat portion 12 is completely closed, only the horizontal component force F1 in which the gas spring 26 acts as a strut is generated. That is, in the case of the conventional connection structure, the gas spring 26 does not operate unless the seating portion 12 is slightly opened. Therefore, as described in Patent Document 2, for example, a damper member of polyurethane foam, a torsion spring or the like is required to obtain an initial rising force.

  (Swaying auxiliary means)

  As shown in FIGS. 1 to 3, the swing assist means 28 assists the initial rising and lifting force of the gas spring 26, and is a link provided foldably mainly in conjunction with the swing of the upper surface plate 20. It comprises a mechanism 48 and link biasing means 50 for biasing the link mechanism 48 in the direction to expand from the folded state.

  <Link mechanism>

  The link mechanism 48 has a first arm 52 rotatably supported at one end by a pivot shaft 30 provided on the inner side surface (surface on the space 18 side) of the upper surface plate 20, and an inner surface (space of the bottom plate 22). The other end of the second arm 56, one end of which is rotatably supported at one end on the rotation shaft 54 provided on the surface 18), is rotatably connected by a rotation pin 58. In the link mechanism 48 in the present embodiment, the same pivot shaft 30 as the gas spring 26 is used as the pivot shaft 30 provided on the inner side surface of the upper surface plate 20, but may be provided separately.

  As shown in FIG. 1, the first arm 52 is formed in a shape in which a pair of parallel arm plates 52A, 52A are connected by a connecting plate 52B shorter than the arm plate 52A, and is rotated around one end of the pair of arm plates 52A, 52A. The moving shaft 30 penetrates. Similarly, the second arm 56 is formed in a shape in which a pair of parallel arm plates 56A and 56A are connected by a connecting plate 56B shorter than the arm plate 56A, and the pivot shaft 54 is provided at one end of the pair of arm plates 56A and 56A. It is penetrating. One end of the pivot shaft 54 is supported by the side portion 22 B of the bottom plate 22, and the other end is supported by a support member 60 provided upright on the bottom flat portion 22 A of the bottom plate 22. The other ends of the pair of arm plates 52A, 52A and the other ends of the pair of arm plates 56A, 56A are rotatably supported by the rotation pin 58 so as to be penetrated.

  The width of the arm plate 52A of the first arm 52 and the width of the arm plate 56A of the second arm 56 (the width in the direction in which the seating portion 12 swings) is the height of the space 18 of the seating portion 12 (the seating portion 12 is closed) Is formed to be smaller than the distance between the top plate 20 and the bottom plate 22).

  Thus, the link mechanism 48 is provided in a foldable manner interlocking with the swinging of the upper surface plate 20, and as shown in FIG. 2B, the first arm 52 and the second arm 52 are closed when the seating portion 12 is closed. The arm 56 is folded in a straight line and accommodated in the space 18 of the seat 12.

  Further, the pair of arm plates 52A, 52A of the first arm 52 has a concave notch 52C so that the arm plate 52A does not hit the pivot shaft 54 when the link mechanism 48 is folded in a straight line. Reference) is formed.

  <Link biasing means>

  1 to 3 show an example of a torsion spring (torsion spring) 50A as the link urging means 50. As shown in FIG. That is, the torsion spring 50A is wound around the pivot pin 58 of the link mechanism 48, and one end thereof is supported by contact with the connecting plate 52B of the first arm 52, and the other end is connected to the connecting plate 56B of the second arm 56. Abutment is supported. The torsion spring 50A applies an urging force in a direction in which the link mechanism 48 is expanded.

  The winding diameter of the torsion spring 50A on the pivot pin 58 is set to a diameter that can be accommodated in the space 18 of the seating portion 12 in the closed state.

  The pivot shafts 30 and 54 of the first arm 52 and the second arm 56 in the link mechanism 48 are disposed on the front end side of the seating portion 12. As a result, when the pivot pin 58 is used as the fulcrum and the pivot shafts 30, 54 are used as the point of action, the application point of the applied force of the torsion spring 50A, that is, the force in the direction to open the seating portion 12 is It becomes the front end side of the seating portion 12. Therefore, a large swinging force in the opening direction can be exerted on the seat portion 12.

  The torsion spring 50A may be attached either to the pivot pin 58 of the link mechanism 48 or to the pivot shaft 24 of the seating section 12. However, attaching the torsion spring 50A to the pivot pin 58 of the link mechanism 48 is an efficient wedge principle. Because it can be used in the same way, a larger swinging force can be obtained. A spring (not shown) may be used instead of the torsion spring 50A.

  FIG. 6 shows the case where a V-shaped leaf spring 50B is used as another aspect of the link biasing means 50. As shown in FIG.

  As shown in FIG. 6, the plate spring 50B is in the vicinity of the pivot shaft 54 of the second arm 56 of the link mechanism 48 and between the flat bottom portion 22A of the bottom plate 22 and the connecting plate 56B of the second arm 56. It is provided between. That is, one V-shaped side of the plate spring 50 B is supported by the flat bottom portion 22 A of the bottom plate 22, and the other side is supported by the connecting plate 56 B of the second arm 56.

  Although not shown, the plate spring 50B may be provided in the vicinity of the pivot pin 58 between the connecting plate 52A of the first arm 52 and the connecting plate 56A of the second arm 56.

  As described above, by using the plate spring 50B as the link biasing unit 50, it is possible to obtain a large swinging force for swinging the seating portion 12 more than the torsion spring 50A.

  (Lock means)

  As shown in FIGS. 1 to 3, the locking means 16 locks the swinging motion of the seating portion 12 to lock the seating portion 12 in the closed state, and mainly comprises the lock bar 62, the engagement member 64 and the like. , Slide mechanism 66, biasing means 68 for locking, and unlocking means 70.

  The lock bar 62 is formed in a round bar shape, is provided on the inner side surface of the rear end portion of the upper surface plate 20, and is supported by both side portions 20B and 20B of the upper surface plate 20.

  The engagement member 64 engages with the lock bar 62 and is supported on the inner surface of the rear end portion of the bottom plate 22 via the slide mechanism 66. The engagement member 64 has a rectangular upper side central portion cut out, thereby forming an engagement groove 64A that engages with the lock bar 62 when the seat 12 is closed. Further, on the upper side portion of the engaging member 64 not on the front end portion side, there is provided an inclined portion 64B inclined obliquely downward toward the rear end side.

  The lock bar 62 may be engaged by only one engagement member 64, but in the present embodiment, the two engagement members 64 are supported by the slide mechanism 66 at intervals in the width direction of the bottom plate 22. It was made to do. As a result, the structurally strong locking means 16 can be formed, and the seating portion 12 can be reliably locked.

  The slide mechanism 66 slidably supports the engagement member 64 in the front-rear direction of the seat portion 12, and a pair of long holes 66A formed opposite to both side portions 22B and 22B of the bottom plate 22. , 66A, and a slide rod 66B that supports the engagement member 64 through and has both ends engaged and supported by the pair of elongated holes 66A, 66A. The long holes 66A are formed in the side portions 22B of the bottom plate 22 as long holes in the front-rear direction.

  The slide mechanism 66 may be a pair of long holes 66A and one slide rod 66B, but in the present embodiment, the slide mechanism 66 is configured by two pairs of long holes 66A and two slide rods 66B. That is, two pairs of elongated holes 66A are formed in proximity to both side portions 22B of the bottom plate 22, and the slide rods 66B are engaged and supported in the two pairs of elongated holes 66A. Then, the two slide rods 66B are connected by the two engagement members 64. Thereby, a structurally strong slide mechanism 66 can be formed, and the engagement member 64 can be slid smoothly and accurately.

  The lock biasing means 68 biases the engagement member 64 toward the rear end portion of the seat portion 12, and a tension spring or a rubber cord can be suitably used. The lock biasing means 68 is fixed at one end to the central portion of the slide rod 66B on the rear end side of the two slide rods 66B, and the other end is erected at the rear end of the bottom flat portion 22A of the bottom plate 22. It is fixed to the fixed plate 68A.

  By forming the lock means 16 as described above, when the seat portion 12 is swung in the closing direction, the lock bar 62 abuts on the inclined portion 64B of the engagement member 64 to lock the engagement member 64. It slides to the front end side against the urging force to the rear end side of the urging means 68. When the lock bar 62 is disengaged from the inclined portion 64B, the lock bar 62 is dropped and engaged with the engagement groove 64A of the engagement member 64 and engaged with the engagement groove 64A. A biasing force acts on the rear end side. As a result, the swinging operation of the seating portion 12 can be locked to lock the seating portion 12 in the closed state.

  As shown in FIG. 1, the unlocking means 70 disengages the lock bar 62 from the engagement groove 64A of the engagement member 64 by sliding the engagement member 64 toward the front end of the seat portion 12. It is what unlocks.

  That is, the lock release means 70 includes a round bar-like release bar 70A rotatably supported by the side portions 22B and 22B on both sides of the bottom plate 22, and a release lever 70B provided on one side of the release bar 70A. The release lever 70C and the cam plate 70D are provided on the release bar 70A.

  The release bar 70A is provided further on the rear end side than the slide bar 66B on the rear end side of the two slide bars 66B. The position of the top plate 20 corresponding to the position of the bottom plate 22 where the release bar 70A is provided is a portion not having the side portion 20A of the top plate 20, and even when the seat portion 12 is closed, the top plate 20 is the release bar 70A. And does not hit the release lever 70B.

  Further, one end side of the release bar 70A protrudes outward from the side portion 22B of the bottom plate 22, and the proximal end portion of the release lever 70B is fixed to this protrusion. The distal end portion of the release bar 70B is formed to be thicker than the proximal end portion, and a grip portion 70C in which the user M grips the release lever 70B is formed.

  In the release bar 70A, cam plates 70D and 70D (e.g., elliptical cam plates) having an arc portion with a short distance from the axis of the release bar 70A and a long arc portion are supported at a distance to penetrate and supported. There is. Then, in a state where the seat portion 12 is locked, that is, in a state in which the release lever 70B is in a lying state, the short arc portion of the cam plate 70D is in contact with the slide rod 66B.

  When the lock means 16 is released, the release lever 70B is lifted to rotate the release bar 70A. As a result, the long arc portion of the cam plate 70D abuts on the slide bar 66B and pushes the slide bar 66B toward the front end of the seat portion 12. As a result, since the engaging member 64 slides toward the front end of the seat 12, the lock bar 62 is disengaged from the engaging groove 64A of the engaging member 64 and the lock is released.

  Although one cam plate 70D may be provided, in the present embodiment, two release plates 70A are provided at intervals. Thereby, when the lock of the lock means 16 is released, the engagement member 64 can be reliably slid to the front end side of the seat portion 12.

  (Another aspect of the swing assistance means)

  FIG. 7 shows another mode of the swing assist means 28, and is a case of two rows of swing assist means 28 and 28B disposed on the rear end side and the front end side of the seat portion 12, respectively. Therefore, the swing mechanism 14 is formed by the gas spring 26 and the two-row swing assist means 28 and 28B.

  The swing assist means 28 disposed on the rear end side has been described with reference to FIGS. 1 to 3 and thus will not be described again. Further, the structure of the swing assist means 28B disposed on the front end side is the same as the swing assist means 28 on the rear end side.

  That is, the rocking auxiliary means 28B includes a link mechanism 72 provided foldably in conjunction with the rocking of the upper surface plate 20, and a link urging means 74 for urging the link mechanism 72 in a direction to expand from the folded state. It consists of

  The link mechanism 72 includes a first arm 78 whose one end is rotatably supported by a pivot shaft 76 provided on the inner side surface of the top plate 20 and a pivot shaft 80 provided on the inner side surface of the bottom plate 22. The other ends of the second arm 82 rotatably supported at one end are pivotally connected by a pivot pin 84. Further, although in FIG. 7 the torsion spring is used as the link biasing means 74, a spiral spring, a plate spring and a coil spring can be used as well as the swing assist means 28 on the rear end side.

  [How to use the stand-up assistance device]

  As shown in FIG. 8A, the standup assisting apparatus 10 according to the embodiment of the present invention is used by the user M by placing it on the seat of the chair 86 or only when the user M stands up from the chair A caregiver (not shown) inserts and uses between the buttocks MA of the user M and the seat surface of the chair 86.

  In such a method of use, if the thickness of the standing-up assisting device 10 is thick, the height from the floor surface 88 becomes too high, and the user MB's foot MB tends to be separated from the floor surface 88, and the seating feels good There is a problem that can not be secured. In particular, when the short user M stands up with the foot MB floating from the floor surface 88 by using the standup assisting device 10, there is a risk of falling.

  In addition, even when the caregiver inserts the erecting assisting device 10 between the buttocks MA of the user M and the chair 86 to assist erecting only when the user M stands up, if the thickness of the erecting assisting device 10 is thick, it is difficult to insert Become.

  However, as described above, in the standing up assisting device 10 according to the embodiment of the present invention, both ends of the gas spring 26 and the pivot shafts 30, 32 are connected via the offset member 36. As a result, even if the seat 12 is closed, the gas spring 26 does not act as a support bar as in the prior art.

  Therefore, as shown in FIG. 8B, when the user M stands up from the chair 86, the release lever 70B of the standup assisting device 10 is pivoted upward to release the lock of the seat 12 by the lock means 16. The initial rising and raising force of the gas spring 26 acts on the seating portion 12 alone. As a result, the seat plate 20 of the seating portion 12 swings upward, and assists the user M standing up.

  Thus, the rising assisting device 10 according to the embodiment of the present invention can obtain an initial rising lifting force for starting to swing the seat 12 by the gas spring 26. Therefore, it is not necessary to use a large diameter wire and a large diameter torsion spring other than the gas spring 26 in order to obtain the initial rise-up force as in the prior art. That is, the standup assisting device 10 according to the embodiment of the present invention may have a thickness 18 of the space of the seating portion 12 which can accommodate the diameter of the body portion 26C of the gas spring 26. Thereby, since it is possible to obtain an extremely thin erecting assisting device 10 having a thickness of 20 mm at the upper limit, the distance from the floor surface 88 to the top plate 20 of the erecting assisting device 10 can be substantially the same as the seat surface of the chair 86 .

  Therefore, the user M can ensure a good sitting feeling and can smoothly insert the standup assisting device between the buttocks MA of the user M and the seating surface of the chair 86 when the caregiver inserts the erection assisting device. it can.

  Further, in the standup assisting apparatus 10 according to the embodiment of the present invention, since the swinging assisting means 28 for assisting the initial standup lifting force of the gas spring 26 is provided, the user M with heavy weight uses the standup assisting apparatus 10. You can also help standing up smoothly. In this case, since the gas spring 26 mainly exerts the initial initial lifting force, it is not necessary to use, for example, a torsion spring or the like having a large wire diameter and a large winding diameter as the swing assisting means.

  Further, in the standup assisting apparatus 10 of the embodiment of the present invention, the gas spring 26 and the swinging assisting means 28 are disposed in parallel in the space 18 of the seating portion 12.

  Thus, the provision of the swing assist means 28 does not increase the thickness of the stand-up assist device 10.

In addition to the chair 86, the standup assisting device 10 according to the embodiment of the present invention may be used for a wheelchair. In addition, because it is thin and narrow, it is convenient for carrying around, and it can also be used when users and caregivers carry around and sit on park benches.
Furthermore, since the standup assisting device 10 according to the embodiment of the present invention is extremely thin, it can also be used as an aid for a care bed. For example, by inserting the standup assisting device 10 between the back of a person who has slept in a bed and the bed and releasing the locking means, it can be used as aiding to raise the upper body of the person who slept. Also, by inserting the standup assisting device 10 between the buttocks of the person who has raised the upper body and the bed, and releasing the locking means, it can also be used as an aid to stand up from the bed to the floor.

  DESCRIPTION OF SYMBOLS 10 ... standup auxiliary device, 12 ... seating part, 14 ... rocking mechanism, 16 ... locking means, 18 ... space, 20 ... top plate, 20A ... seat surface flat part, 20B ... side edge part, 22 ... bottom plate, 22A ... Bottom surface flat portion, 22B ... Side side portion, 22C, 22D ... Notch, 24 ... Swing shaft, 26 ... Gas spring, 26A ... Piston rod, 26B ... Connecting rod, 26C ... Body part, 28 ... Swing support means 30, 32, rotation shaft 34, support member 36 (36A, 36B) offset member 38 connection hole 40 connection portion 42 through hole 44 rotation support portion 46 male screw , 47: link member, 48: link mechanism, 50: link biasing means, 50A: torsion spring, 50B: leaf spring, 52: first arm, 52A: arm plate, 52B: connection plate, 54: pivot shaft , 56 ... 2nd arm, 56A ... A Plate 56B connecting plate 58 pivoting pin 60 support member 62 lock bar 64 engaging member 64A engaging groove 64B inclined portion 66 sliding mechanism 66A long hole 66B: slide rod, 68: biasing means for locking, 70: unlocking means, 70A: releasing bar, 70B: releasing lever, 70C: gripping portion, 70D: cam plate, 72: link mechanism, 74: biasing for link Means, 76: pivoting axis, 78: first arm, 80: pivoting axis, 82: second arm, 84: pivoting pin, 86: chair, 88: floor, S1: pivoting axis, S2: Emergence axis, F1 ... horizontal force, F2 ... vertical force, F3 ... total force, M ... user, MA ... buttocks, MB ... foot

Claims (12)

A seating portion in which a front end portion of an upper surface plate and a bottom plate overlapping in the vertical direction is swingably connected and supported;
A swing mechanism configured to swing the opening and closing of the seating portion by swinging the upper surface plate with respect to the bottom plate;
And locking means for locking the seating portion in a closed state by locking the swinging operation of the swinging mechanism, and the release of the locking means operates the swinging mechanism to operate the rear end portion of the upper surface plate. A lifting assistance device for assisting a person sitting on the seating portion to stand up by lifting the upper plate to incline the upper plate;
The swing mechanism is
The upper surface plate is rotatably supported at one end and the other end is rotatably supported at the bottom surface plate, and the piston rod projects to at least a cylinder device that swings the seating portion in the opening direction. ,
An offset in which at least one of the one end and the other end of the cylinder device is offset so that the pivot axis of the pivot shaft and the projection axis of the piston rod orthogonal to the pivot axis do not intersect in the same plane A standup assisting device supported by the pivot shaft through a member.   The offset member is provided at both one end and the other end of the cylinder device, and the first offset member on the upper surface plate side offsets the projecting and retracting axis with respect to the rotation axis and the bottom surface The standup auxiliary device according to claim 1, wherein the second offset member on the face plate side offsets the projecting and retracting axis toward the bottom plate with respect to the pivot axis.   The sum of the offset amounts of one end and the other end of the cylinder device when the separation distance between the rotation axis of the rotation axis not intersecting on the same plane and the projection axis of the piston rod is an offset amount The standup assistance device according to claim 1 or 2 whose length is 4 mm or more and 8 mm or less.   There is a rectangular thin plate-like space between the top plate and the bottom plate which are overlapped in the vertical direction, and the swing mechanism is accommodated in the space when the seating portion is closed. The standing-up assistance apparatus in any one of 3. thru | or 3. The swing mechanism is
One end is rotatably supported by a first arm rotatably supported at one end by a rotation shaft provided on the inner side surface of the upper surface plate and by a rotation shaft provided at the inner side surface of the bottom plate. The other end of the second arm is pivotally connected by a pivot pin so as to be foldable interlockingly with the swinging of the seating portion, and in the state where the seating portion is closed, the first arm A link mechanism in which the second arm and the second arm are folded in a straight line,
Link urging means for urging the link mechanism in a direction to expand from the folded state, and further comprising swing assisting means for opening the seating portion in cooperation with the cylinder device;
5. The standup assistance device according to claim 4, wherein the swing assist means and the cylinder device are disposed in parallel in the space of the seat along the swing direction of the seat. The swing assist means is
The standup assistance device according to claim 5, which is disposed on the rear end side and the front end side of the seating portion. The lock means is
A lock bar provided on the inner side surface of the rear end portion of the upper surface plate;
An engagement member provided on the inner surface at the rear end of the bottom plate and having an engagement groove engaged with the lock bar when the seat is closed;
A slide mechanism slidably supporting the engagement member in the front-rear direction of the seating portion;
Lock biasing means for biasing the engagement member toward the rear end of the seat;
Lock release means for releasing the engagement between the lock bar and the engagement groove of the engagement member by sliding the engagement member toward the front end of the seat portion;
The lock bar abuts on the engaging member when the upper plate is swung in the closing direction of the seating portion, and the engaging member opposes the locking biasing means to the front end side The standup assistance device according to any one of claims 1 to 6, further comprising:   The standup assisting device according to any one of claims 1 to 7, wherein the cylinder device is a gas spring.   The standup assisting device according to any one of claims 5 to 7, wherein the link biasing means of the swinging assisting means is any one of a torsion spring, a spiral spring, a plate spring, and a coil spring.   The upper limit of the thickness of the said standup auxiliary device is 20 mm, The standup auxiliary device in any one of Claim 1 to 9. The upper surface plate is rotatably supported at its both ends by a pair of pivoting shafts provided on respective inner side surfaces of the upper surface plate and the bottom plate pivotally coupled and supported, and the piston rod protrudes and retracts. An offset member for connecting the end of the cylinder device in the direction of movement and the pivot shaft,
The offset member is
A through hole through which the pivot shaft passes;
And a connecting hole orthogonal to the through hole and connecting an end of the cylinder device,
When the end of the cylinder device is connected to the connection hole by penetrating the pivot shaft into the through hole, the piston rod is perpendicular to the pivot axis of the pivot shaft and the pivot axis. An offset member characterized in that it does not intersect with an axial center on the same plane.   The offset member according to claim 11, wherein the cylinder device is a gas spring.